Ventricular fibrillation (VF) is a cardiac condition characterized by a chaotic, rapid heart rhythm, typically with a rate above 300 bpm. It is a cardiac arrest rhythm that requires immediate intervention (defibrillation).

Electrocardiographic Criteria

  • Chaotic, disorganized ventricular activity
  • No identifiable QRS complexes

ECG in Ventricular Fibrillation

Electrocardiogram showing ventricular fibrillation

Ventricular fibrillation. Arrest rhythm with chaotic, irregular electrical activity.

References

  1. Scheffer MK, De Marchi MFN, de Alencar Neto JN, Felicioni SP. Eletrocardiograma de A a Z. São Paulo: Manole, 2024.